| 1.   (5 − 83) 
− 3 = -510 | 2.   (1 + 6 − 8 
− 32 + 3) = -7 | 
| 3.   (8 + 8 − 7) 
× 8 = 72 | 4.   5 − (33 
× 23) − 7 = -218 | 
| 5.   (5 − 2) + 
8 = 11 | 6.   32 − 
1 × (9 × 72) × 8 = -3519 | 
| 7.   (1 + 6 − 5) 
= 2 | 8.   (3 + 42 
− 43 + 6) = -39 | 
| 9.   72 + 
9 × (7 − 6) + 2 = 60 | 10.   (53 
× 3 + 1) = 376 | 
| 11.   8 × (9 × 
6 − 1) = 424 | 12.   12 × 
82 × (3 − 62) − 1 = -2113 | 
| 13.   (9 − 23 
× 9 + 53) × 5 = 310 | 14.   9 × 9 × 
(6 − 3 × 7) = -1215 | 
| 15.   52 − 
(4 × 6) × 82 + 1 = -1510 | 16.   (1 − 9 × 
2) = -17 | 
| 17.   (8 × 73 
× 9) = 24696 | 18.   (8 − 5) + 
8 + 3 = 14 | 
| 19.   (13 
− 2) + 83 − 3 = 508 | 20.   (8 + 7 × 42 
× 73) × 3 = 115272 | 
|  |